solve misleading struct deprecatedSecretParamsMap

[hoyho]

since the struct contains "deprecated" prefix hinting but some of the key is not really deprecated.
so it may confuse us. This is a private struct, it's simple to just rename in Controller and
test file.

224

What type of PR is this?

Uncomment only one /kind <> line, hit enter to put that in a new line, and remove leading whitespaces from that line:

/kind api-change
/kind bug

/kind cleanup

/kind design
/kind documentation
/kind failing-test
/kind feature
/kind flake

What this PR does / why we need it:
solve misleading struct deprecatedSecretParamsMap
Which issue(s) this PR fixes:

Fixes #224

Special notes for your reviewer:

Does this PR introduce a user-facing change?:

NONE

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[msau42]

/ok-to-test

[msau42]

/lgtm
/approve

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