Update ls release version automatically using ldflags

[MatteoPologruto]

Please check if the PR fulfills these requirements

• [x] The PR has no duplicates (please search among the Pull Requests before creating one)
• [x] The PR follows our contributing guidelines
• [ ] Tests for the changes have been added (for bug fixes / features)

What kind of change does this PR introduce?

Infrastructure enhancement

What is the current behavior?

The Language Server's version (ServerInfo) has to be manually set to the new one during the release process.

What is the new behavior?

The Language Server's version will be automatically updated using ldflags. The version will also be printed in the log when a new Arduino Language Server is configured. The changes were tested in this release: https://github.com/MatteoPologruto/arduino-language-server/releases/tag/99.99.99

---