Prepend migrated legacy examples to resource samples

[shuyama1]

Ensures that legacy examples converted to samples (in-memory) are prepended and ordered before any newly added samples.

Since the generator uses the first example to generate any iam/datasource/list resource - this is to ensure any new samples added won't change what config is used to generate those tests before the migration is fully completed.

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See Write release notes for guidance.

[modular-magician]

Hi there, I'm the Modular magician. I've detected the following information about your changes for commit c639468:

Diff report

Your PR generated the following diffs in downstream repositories:

Repository	Diff Link	Changes
google provider	View Diff	2 files changed, 98 insertions(+), 98 deletions(-)
google-beta provider	View Diff	2 files changed, 98 insertions(+), 98 deletions(-)

Test report

Analytics

Total Tests	Passed	Skipped	Affected
41	41	0	0

Affected Service Packages

• workstations

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@shuyama1 VCR tests complete for c639468!