Add comments from GitHub actions

[jonahgraham]

Fix/cleanup auto-commenting in PRs from GitHub actions:

• Add a documentation link when docs are updated (see Generate more of the documentation with asciidoc and automate more #995 (comment))
• Review JUnit test reports which sometimes generates a comment and sometimes doesn't, this may be simply an out of date configuration for JUnit, have a look at SWT's for some ideas https://github.com/eclipse-platform/eclipse.platform.swt/blob/master/.github/workflows/junit.yml

[jonahgraham]

tests are being reported against license checks,

this is related to OP and this also hides the problem of the license checks failing:

cc: @betamaxbandit

[jonahgraham]

I was made aware of the license check fails because @betamaxbandit was getting emails about the fails, and I wasn't. I had turned off GitHub actions notifications in https://github.com/settings/notifications

[jonahgraham]

For the JUnit comment doesn't always appear in the PR, there is a message in the build (link):

2025-01-15 17:59:29 +0000 - publish -  INFO - There is no pull request for commit 08d6339ba5fdd7b4b469f637d019bd8f65ca8f06

[jonahgraham]

this is related to OP and this also hides the problem of the license checks failing:

It doesn't actually hide it, the complete failure of the workflow seems to stop it being fully published to the PR, and then the JUnit results attaches itself randomly to a job, sometimes this one that was failing.

[jonahgraham]

Originally posted by @github-actions[bot] in #1033 (comment)

Here are test results, but they say number of tests have gone down, which is weird. Some more investigation may be needed here. Actually these test results were accurate, some tests didn't run because of maven failed to complete build failure. See #1033 (comment)

Test Results

   590 files   -  11     590 suites   - 11   12m 59s ⏱️ +11s
10 079 tests  - 121  10 056 ✅  - 121  23 💤 ±0  0 ❌ ±0 
10 117 runs   - 121  10 094 ✅  - 121  23 💤 ±0  0 ❌ ±0 

Results for commit 4086e29. ± Comparison against base commit 751b031.

This pull request removes 121 tests.

org.eclipse.cdt.debug.core.memory.tests.PlainTextTransportTest ‑ transport0ffff
org.eclipse.cdt.debug.core.memory.tests.PlainTextTransportTest ‑ transport10000
org.eclipse.cdt.debug.core.memory.tests.PlainTextTransportTest ‑ transport10001
org.eclipse.cdt.debug.core.memory.tests.RAWBinaryTransportTest ‑ transport0ffff
org.eclipse.cdt.debug.core.memory.tests.RAWBinaryTransportTest ‑ transport10000
org.eclipse.cdt.debug.core.memory.tests.RAWBinaryTransportTest ‑ transport10001
org.eclipse.cdt.debug.core.memory.tests.SRecordTransportTest ‑ transport0ffff
org.eclipse.cdt.debug.core.memory.tests.SRecordTransportTest ‑ transport10000
org.eclipse.cdt.debug.core.memory.tests.SRecordTransportTest ‑ transport10001
org.eclipse.cdt.dsf.gdb.multicorevisualizer.ui.test.PersistentSettingsManagerTest ‑ testGlobalParamsWithMultipleInstances
…