Enabled developer to input PR number for lsp4ij checkout input

[vaisakhkannan]

Fixes #998

Allowing developers to input the PR number for LSP4IJ checkout.

I made some slight changes to the artifact name setup, but there is no effect on previous scenarios. Additionally, I have now enabled specifying the LSP4IJ branch name, tag, PR number, or commit SHA based on the input provided by the developer.

[vaisakhkannan]

If a developer want to check out LSP4IJ based on a PR number, then developer can check the box labeled “If you checked this, please make sure to enter only the LSP4IJ PR number below” and specify the PR number in the provided text field labeled “Reference/branch for LSP4IJ checkout.” Additionally, developer can specify the tag or branch of the liberty-tools-intellij repository to be used.


NOTE: Make sure to enable the checkbox labeled “Use lsp4ij locally” as well for this case.

Example run

@TrevCraw , Please suggest the changes in the wordings

[vaisakhkannan]

Reference workflow runs :

https://github.com/vaisakhkannan/liberty-tools-intellij/actions/runs/11276704777 -- Normal push/PR builds
https://github.com/vaisakhkannan/liberty-tools-intellij/actions/runs/11276788312 -- Cron Job build

Manually running workflow examples

https://github.com/vaisakhkannan/liberty-tools-intellij/actions/runs/11276799815 ( developer entered PR number 411 and LTI version 24.0.9 --> merge commit sha value is not null, so no warning)

https://github.com/vaisakhkannan/liberty-tools-intellij/actions/runs/11276805354 ( developer entered PR number 500 and LTI version 24.0.9 --> merge commit sha value is null, so warning is present )

https://github.com/vaisakhkannan/liberty-tools-intellij/actions/runs/11276809742 -- LTI main & LSP4IJ main-- ( user entered branch name , main as an input for LSP4IJ checkout )

https://github.com/vaisakhkannan/liberty-tools-intellij/actions/runs/11276824366 -- ( user entered merge commit sha as an input for LSP4IJ checkout and LTI 24.0.9 )

https://github.com/vaisakhkannan/liberty-tools-intellij/actions/runs/11276832458 -- ( user entered LTI 24.0.9 and LSP4IJ main as an input for LSP4IJ checkout )