[BUG] install_dashboards github action is not properly handling multi-digit major or minor versions

[cwperks]

Now that 2.x is on 2.10, its exposed an issue on the install-dashboards Github Action which has logic to extract the branch name and major version from package.json. The commands are currently using cut and assuming that the major and minor versions are both single digits which is not the case now.

Problematic Block: https://github.com/opensearch-project/security-dashboards-plugin/blob/main/.github/actions/install-dashboards/action.yml#L41-L46

This is currently block the version increment PR in the 2.x branch: #1526

[RyanL1997]

Closing this due to the merge of #1537