[ciscolive] Fix issues and dynamically fetch tokens

[L0wbyte]

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• Bug fix
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Description of your pull request and other information

addresses the 3x issues I raised and detailed in #30864

static rainfocus api's in extractor are no longer valid
i have addressed this in the same way the browser does, by fetching the tokens from a js script. It is plausible to only update the static tokens (they have been valid since 2018).
This method may be more useful if the api key updates again, however it equally has the risk of failing if the site javascript dramatically changes.

i have left in the RAINFOCUS_API_PROFILE_ID and RAINFOCUS_WIDGET_ID constants but set them to blank.
If blank the values will be fetched at runtime via a _download_webpage() call.
In future if somebody wished to quickly patch the extractor they could set these values without needing to debug why the dynamic fetch is failing.

tests no longer pass
testing url's and info_dict have been updated with url's and data that are current and pass the tests.

ciscolive domain has changed
updated Origin to match valid domain, updated regex to no longer permit old domain (ciscolive.cisco.com), updated tests with url paths featuring the new domain.

added a couple informative ExtractorError() these occur when tokens can not be obtained or video playlists are empty (the later can occur in 2 scenarios:

1. where a search returns 0 results (which would result in no download occuring)
2. where the api key was invalid but the search would have otherwise returned >0 results.

I'm conscious the messages on these ExtractorErrors() could be better/shorter.

technical details for each including failing outputs are contained within issue #30864

Relevant working test outputs

$ python test/test_download.py TestDownload.test_CiscoLiveSession
[CiscoLiveSession] catalog.js: Downloading webpage
[CiscoLiveSession] 16360600004400017rMx: Downloading webpage
[brightcove:new] 6128601216001: Downloading JSON metadata
[brightcove:new] 6128601216001: Downloading m3u8 information
[brightcove:new] 6128601216001: Downloading m3u8 information
[brightcove:new] 6128601216001: Downloading MPD manifest
[brightcove:new] 6128601216001: Downloading MPD manifest
[info] Writing video description metadata as JSON to: test_CiscoLiveSession_6128601216001.info.json
[debug] Invoking downloader on 'https://bcbolt446c5271-a.akamaihd.net/media/v1/pmp4/static/clear/5647924234001/b460c78b-b38e-4aa9-b363-538e45f53415/417dfc89-f5ef-41cb-8af9-6a4a7477c109/main.mp4?akamai_token=exp=1652642459~acl=/media/v1/pmp4/static/clear/5647924234001/b460c78b-b38e-4aa9-b363-538e45f53415/417dfc89-f5ef-41cb-8af9-6a4a7477c109/main.mp4*~hmac=fdf8c03287cdda9b213427413978da4fd903737f11c180bc889b8218524e09fa'
[download] Destination: test_CiscoLiveSession_6128601216001.mp4
[download] 100% of 10.00KiB in 00:00
.
----------------------------------------------------------------------
Ran 1 test in 2.573s

OK

$ python test/test_download.py TestDownload.test_CiscoLiveSearch
[download] Downloading playlist: Search query
[CiscoLiveSearch] catalog.js: Downloading webpage
[CiscoLiveSearch] Downloading search JSON page 1
[CiscoLiveSearch] playlist Search query: Downloading 3 videos
[download] Downloading video 1 of 3
[download] Downloading video 2 of 3
[download] Downloading video 3 of 3
[download] Finished downloading playlist: Search query
.
----------------------------------------------------------------------
Ran 1 test in 0.889s

OK

[dirkf]

Thanks for the work!

[dirkf]

Also, check and resolve the failing test output (eg Py3.9 Core):

======================================================================
FAIL: test_no_duplicates (test.test_all_urls.TestAllURLsMatching)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/home/runner/work/youtube-dl/youtube-dl/test/test_all_urls.py", line 83, in test_no_duplicates
    self.assertTrue(ie.suitable(url), '%s should match URL %r' % (type(ie).__name__, url))
AssertionError: False is not true : CiscoLiveSearchIE should match URL 'https://www.ciscolive.com/global/on-demand-library.html?search.technicallevel=scpsSkillLevel_aintroductory&search.event=ciscoliveemea2019&search.technology=scpsTechnology_dataCenter&search.focus=scpsSessionFocus_bestPractices#/'

[L0wbyte]

Failed tests are now fixed, seems i had left a / off global/ in the CiscoLiveSearchIE _VALID_URL regex.
L0wbyte@9409e00#diff-39087b9fd88e46ad9ea0b1725fce45470a91a8eecccda1891c129b0794ae6e7fR117

$ python3 test/test_all_urls.py TestAllURLsMatching
..............
----------------------------------------------------------------------
Ran 14 tests in 14.689s

OK

$ python3 test/test_execution.py TestExecution.test_lazy_extractors
WARNING: Lazy loading extractors is an experimental feature that may not always work
..............
----------------------------------------------------------------------
Ran 14 tests in 17.109s

OK
.
----------------------------------------------------------------------
Ran 1 test in 18.236s

OK

[dirkf]

Thanks.

I enabled the CI tests. Please check the results (at least Linter and the core and download tests for Py2.7, Py3.10, possibly Py3.5 too -- for the download tests just search the logs for ciscolive).

[dirkf]

Some security snafu has broken the web again, so the CI tests are failing (actions/setup-python#866). I'll see if the recommended hack works for the moment... YES!