cli: Add --no-idl option to the test command

[acheroncrypto]

Problem

If you make a change to your program, but the API of the program stays the same, building the IDL is pointless and takes additional time.

There is no direct way (other than --skip-build which we don't want) to stop the IDL from building before tests. You'd have to combine both the build and the test command to reduce this extra build time:

anchor build --no-idl && anchor test --skip-build

Summary of changes

Add --no-idl option to the test command, similar to #2847.

[vercel]

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