Build lsp4ij plugin from a branch to use in the LTI automated tests

[anusreelakshmi934]

• Checkout an lsp4ij branch and create a zip file with that. Install the zip file in the workflow.
• Similar to what we are doing with liberty-tools-intellij, that is using bash ./gradlew buildPlugin, check wheather we can checkout the latest merge commit and run ./gradlew buildPlugin

[anusreelakshmi934]

We can generate a zip file by executing ./gradlew buildPlugin within the lsp4ij repository. Afterward, we can move this zip file to a designated location within the Liberty Tools IntelliJ. Following this, we're ready to proceed with building out the Liberty Tools Integration and conducting tests.

[anusreelakshmi934]

Attempted a method to construct the lsp4ij plugin from the main branch for use in the LTI automated tests. Essentially, checked out the lsp4ij main branch and used the buildPlugin command to create a zip file from it.
This zip file is stored in LTI, and specified it as a plugin dependency in build.gradle.
Link to branch - https://github.com/anusreelakshmi934/liberty-tools-intellij/tree/Issue%23758.

[anusreelakshmi934]

#833 - This PR has the changes for this issue.

[anusreelakshmi934]

Checkout any branch of lsp4ij (main or any merge commit SHA) and use the buildPlugin command to create a ZIP file from it. Unzip the file and specify the path to the lib folder as a plugin dependency in build.gradle.
Added the fixes for this in this Umbrella PR - #840.