Allow the go templating in valuesFrom repositories defined in presets

Closes #72 (closed)

As described in #50 (closed), we intent to allow templating in values defined in SylvaUnitsReleasePresets, but skipDataValidation was not propagated to generateConfigMapFromSource function that was unconditionally validating the values that were read from repositories.

The first commit is fixing this issue The second one adds e2e test with some templated values in an oci refereed from a preset

While working on these tests, I realized that current watch/reconile logic was not properly handling the values that were referred from presets (see this comment) this is fixed in a third commit.