Add initial GitHub actions (Linux, Mac)

[cconlon]

This PR adds GitHub actions for automated testing against various JDK distributions and versions. Current testing includes:

wolfSSL ./configure --enable-jni:

• Test on both Linux (ubuntu-latest) and Mac OSX (macos-latest)
• Oracle JDK (17, 21)
• Zulu JDK (8, 11, 17, 21)
• Corretto JDK (8, 11, 17, 21)
• Microsoft JDK (11.0.19, 17.0.7, 21.0.0)

wolfSSL ./configure --enable-jni --enable-all:

• Test on both Linux (ubuntu-latest) and Mac OSX (macos-latest)
• Just a sanity check with --enable-all used, so only currently testing Zulu JDK 11

[JacobBarthelmeh]

This appears to have issues running. The github actions test should run on this PR here when opened.

[cconlon]

Hi @JacobBarthelmeh, after bouncing back and forth some ideas with Andras, my current understanding is that GitHub actions will not run on the first PR that adds them, unless there is a base action in the repository already. Once the base action is in place to test on PRs, new PRs that modify the actions will test those modified changes.

Andras and I tested this by merging in a simple action with #177, then rebasing this PR on master kicked off all the tests included in this PR change as we would expect.

I think this can also be seen if you look back at the first PR for other repos that added their GitHub actions. You'll see that no actions ran on those PRs either:

wolfSSL/wolfMQTT#256
wolfSSL/wolfssh#350

[JacobBarthelmeh]

Thanks @cconlon