Embed the project version using git describe based on project git tags.

NOTE: This feature depends on the release team placing tags on release branches

The embedding is being done in build-time, using go usage of ldflags, and the version
is kept as an internal variable.

Usage
As separate flags: use /bin/vsphere-xcopy-volume-popoulator --version
bin/vsphere-xcopy-volume-populator version: v2.10.4 VIB version: 0.3.0 vmkfstools-wrapper version: 0.3.0

In the logs: the first line of the populator pods spits the internal versions
I0204 19:09:12.426551 1281787 vsphere-xcopy-volume-populator.go:313] bin/vsphere-xcopy-volume-populator version: v2.10.4 VIB version: 0.3.0 vmkfstools-wrapper version: 0.3.0

Formal versions would have a verbatim release tag:
v2.10.4

Develpment versions or nighly builds will have tag + distance + git commit:
v2.10.4-2-gc991f739* binary has the version embedded and every user has access to the source that build it

• Binary is reproducible
• Logs declare the version
• Observability and audit
  • storage backends can send the version as an http header
  • metric exported can export version info