Promotion error should only be shown in verbose mode

[SohumB]

Test plan

See #12312

Description

#12080 again. Error retrieving promotion Error: HTTP response 404 for GET /v1/grants?paymentId=[id]

Steps to Reproduce

1. Clean install 0.19.116
2. Launch from console
3. Enable payments, no claim tokens notification shown
4. Console shows error 404

Reproduces how often:
100%

Brave Version

about:brave info:

Brave: 0.19.116
rev: 139c117
Muon: 4.5.16
libchromiumcontent: 62.0.3202.94
V8: 6.2.414.42
Node.js: 7.9.0
Update Channel: Release
OS Platform: Linux
OS Release: 4.13.0-1-amd64
OS Architecture: x64

[NejcZdovc]

@SohumB this is expected, because there are currently no promotions active. Will remove logging for this use case. Thank you for your report

[SohumB]

Oh, my apologies. The actual issue then is that no wallet addresses for funding payments shows up. I'll make a new issue.

[Edit] ...or they're showing up now. Transient error, I guess! My apologies, carry on as you were :)

[NejcZdovc]

@SohumB yes please do if you have any more problems with payments

[LaurenWags]

Removed QA/checked labels due to changes in milestones. Please recheck with 0.21.15 and higher.

[LaurenWags]

In addition to Test Plan, started Brave with LEDGER_VERBOSE=true to see 404 promotion error.

[kjozwiak]

Received the 404 when running brave via LEDGER_VERBOSE=true brave-beta --user-data-dir-name=brave-beta:

{"statusCode":404,"error":"Not Found","message":"no promotions available"}
Error retrieving promotion Error: HTTP response 404 for GET /v1/grants

Ensure that I didn't get the above 404 error when running brave without LEDGER_VERBOSE=true.