[main] perform manifest transformation earlier

[jkandasa]

Changes

• fixes: "options" adding resource entries on multiple installersets #2002
• with this PR, the transformation applied(very earlier) before splitting the manifest into multiple installersets
• changes some of the logs from Info to Debug

Submitter Checklist

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• Run make test lint before submitting a PR
• Includes tests (if functionality changed/added)
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Release Notes

NONE

[tekton-robot]

The following is the coverage report on the affected files.
Say /test pull-tekton-operator-go-coverage to re-run this coverage report

File	Old Coverage	New Coverage	Delta
pkg/reconciler/kubernetes/tektoninstallerset/client/create.go	77.0%	77.6%	0.5
pkg/reconciler/kubernetes/tektoninstallerset/client/main_set.go	53.1%	52.8%	-0.2
pkg/reconciler/kubernetes/tektoninstallerset/client/pre_post_custom_set.go	63.3%	61.1%	-2.2
pkg/reconciler/kubernetes/tektoninstallerset/client/update.go	82.7%	83.7%	1.0

[tekton-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: vdemeester

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[piyush-garg]

/lgtm

[jkandasa]

/cherry-pick release-v0.70.x

[tekton-robot]

@jkandasa: new pull request created: #2090

In response to this:

/cherry-pick release-v0.70.x

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