Add last git commit hash to build flags

[thunderboltsid]

This ensures we have the git hash of the changes in our CI logs so we can correlate the code changes being executed.

How has this been tested?

$ make build
...
GIT_COMMIT_HASH=`git rev-parse HEAD` && \
	go build -ldflags "-X main.gitCommitHash=${GIT_COMMIT_HASH}" -o bin/manager main.go
$ ./bin/manager
{"level":"info","ts":"2023-11-28T12:31:44+05:30","logger":"setup","msg":"Initializing Nutanix Cluster API Infrastructure Provider","Git Hash":"d28682b71545d20be2810b0951bfafc0fe1f539a"}


$ make docker-build
GIT_COMMIT_HASH=`git rev-parse HEAD` && \
	KO_DOCKER_REPO=ko.local GOFLAGS="-ldflags=-X=main.gitCommitHash=${GIT_COMMIT_HASH}" /Users/sid.shukla/go/src/github.com/nutanix-cloud-native/cluster-api-provider-nutanix/hack/tools/bin/ko-v0.11.2 build -B --platform=linux/amd64,linux/arm64,linux/arm -t latest -L .
...
$ docker run ko.local/cluster-api-provider-nutanix:87369c4ed070d9fd458328efbd3d583b05d07411141e37737fa46ae419dd35ef
{"level":"info","ts":"2023-11-28T07:03:14Z","logger":"setup","msg":"Initializing Nutanix Cluster API Infrastructure Provider","Git Hash":"d28682b71545d20be2810b0951bfafc0fe1f539a"}
...

# From the prow artefact manager logs
2023-11-28T07:38:42Z	INFO	setup	Initializing Nutanix Cluster API Infrastructure Provider	{"Git Hash": "2ec6b8ef047b3a8a99ba748a145d4810b62124fa"}

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (c18f70a) 2.61% compared to head (d28682b) 2.61%.

Additional details and impacted files

@@          Coverage Diff          @@
##            main    #332   +/-   ##
=====================================
  Coverage   2.61%   2.61%           
=====================================
  Files          4       4           
  Lines        995     995           
=====================================
  Hits          26      26           
  Misses       969     969           

☔ View full report in Codecov by Sentry.
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[adiantum]

LGTM

[adiantum]

/approve
/lgtm
/meow

[nutanix-cn-prow-bot]

@adiantum:

In response to this:

/approve
/lgtm
/meow

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the kubernetes/test-infra repository.

[thunderboltsid]

/retest

[adiantum]

/retest

[thunderboltsid]

/retest

[tuxtof]

LGTM

[adiantum]

/retest

[deepakm-ntnx]

pls post the log output of the test showing the commit id for completeness in the description

[github-actions]

✅ None of your dependencies violate policy!

[thunderboltsid]

/retest

[tuxtof]

/lgtm
/approve

[tuxtof]

/lgtm /approve

[nutanix-cn-prow-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: adiantum, thunderboltsid, tuxtof

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