feature: support proxy https request from cloud to edge through yurt-tunnel

[rambohe-ch]

What type of PR is this?

Uncomment only one /kind <> line, hit enter to put that in a new line, and remove leading whitespace from that line:
/kind bug
/kind documentation
/kind enhancement
/kind good-first-issue
/kind feature
/kind question
/kind design
/sig ai
/sig iot
/sig network
/sig storage
/sig storage

/kind feature

What this PR does / why we need it:

1. Yurt-tunnel can proxy https request from cloud to edge nodes, so components(like prometheus) on the cloud nodes can access the https service(like node-exporter) on the edge node through yurt-tunnel.
2. Beside of 10250 and 10255 Ports, In order to support more tcp ports of https and http service on edge nodes. use can configure the yurt-tunnel-server-cfg configmap, and add specified tcp ports in https-proxy-ports and http-proxy-port field of configmap.
3. for example, prometheus on cloud node likes to collect metrics at endpoint https://{nodeIP}:9051 and http://{ndoeIP}:9052 on edge nodes, you need to configure as following:

http-proxy-ports: "9052"
https-proxy-ports: "9051"

Which issue(s) this PR fixes:

Fixes #414

Special notes for your reviewer:

Does this PR introduce a user-facing change?

other Note

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In response to this:

What type of PR is this?

Uncomment only one /kind <> line, hit enter to put that in a new line, and remove leading whitespace from that line:
/kind bug
/kind documentation
/kind enhancement
/kind good-first-issue
/kind feature
/kind question
/kind design
/sig ai
/sig iot
/sig network
/sig storage
/sig storage

/kind feature

What this PR does / why we need it:

1. Yurt-tunnel can proxy https request from cloud to edge nodes, so components(like prometheus) on the cloud nodes can access the https service(like node-exporter) on the edge node through yurt-tunnel.
2. Beside of 10250 and 10255 Ports, In order to support more tcp ports of https and http service on edge nodes. use can configure the yurt-tunnel-server-cfg configmap, and add specified tcp ports in https-proxy-ports and http-proxy-port field of configmap.
3. for example, prometheus on cloud node likes to collect metrics at endpoint https://{nodeIP}:9051 and http://{ndoeIP}:9052 on edge nodes, you need to configure as following:

http-proxy-ports: "9052"
https-proxy-ports: "9051"

Which issue(s) this PR fixes:

Fixes #414

Special notes for your reviewer:

Does this PR introduce a user-facing change?

other Note

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[openyurt-bot]

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[rambohe-ch]

/assign @Fei-Guo @SataQiu

[Fei-Guo]

It seems that you can dedup the code 102-115 with 119-134 by introducing at local function.

[rambohe-ch]

@Fei-Guo It's a good idea, fixed it.

[DrmagicE]

What about using an array rather than a comma-separated string?

[rambohe-ch]

@DrmagicE
I think comma-separated string is more simpler than array string for user to edit fields in configmap resource. because array string like the following setting:

http-proxy-ports: '["aaa", "aaa", "aaa"]'
https-proxy-ports: '["bbb", "bbb", "bbb"]'

so how about keep this comma-separated string design?

[DrmagicE]

Ok, it is reasonable.

[Fei-Guo]

Please add the copyright headers for all the files that miss it in this change. Otherwise, LGTM.

[rambohe-ch]

Please add the copyright headers for all the files that miss it in this change. Otherwise, LGTM.

@Fei-Guo ok, copyright headers are added.

[SataQiu]

/lgtm