Revert redis password change

[eerhardt]

Description

Reverts Add Password To Redis (dotnet/aspire#4642).

azd doesn't allow for secret parameters to be used in command line args of containers. See the code comment here.

		// Unlike environment variables, ACA doesn't provide a way to pass secret values without baking them into the args
		// array directly. We don't want folks to accidentally bake the plaintext value of these secrets into the container
		// definition, so for now, we block this.
		//
		// This logic is similar to what we do in buildEnvBlock to detect when we need to take values and treat them as ACA
		// secrets.

For .NET Aspire 9.1, we will revert back to the 9.0 behavior for Redis containers. We will revisit this issue in 9.2 to decide how we can password protect Redis containers in ACA.

Fixes #7429

Checklist

• Is this feature complete?
  • Yes. Ready to ship.
• Are you including unit tests for the changes and scenario tests if relevant?
  • Yes
• Did you add public API?
  • No
• Does the change make any security assumptions or guarantees?
  • Yes
• Does the change require an update in our Aspire docs?
  • No

[eerhardt]

FYI - These are caused by other changes that didn't update the playground manifests.