fix: deleted IntToDuration overload

[alexsnaps]

The conversion isn't implemented, but mostly isn't part of the language specification. The behavior remains mostly unchanged, the resulting error changes tho, still an error:

• pre: type conversion error from 'int' to 'google.protobuf.Duration'
• post: found no matching overload for 'duration' applied to '(int)'

The error would now be caught by the checker, instead of the evaluation time one previously.

[google-cla]

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[alexsnaps]

Thanks for your pull request! It looks like this may be your first contribution to a Google open source project.

It's not, changed the email to the one you have on file for the CLA.

[TristonianJones]

/gcbrun

[TristonianJones]

@alexsnaps could you update testdata/standard_env.prompt.txt and remove line 222:

cel-go/cel/testdata/standard_env.prompt.txt

Line 222 in 6b8f6d6

duration(int) -> google.protobuf.Duration

[alexsnaps]

Fixed

[TristonianJones]

/gcbrun

[alexsnaps]

If I get this failure right, it complains about the line being gone now?

 - 	      duration(int) -> google.protobuf.Duration

Is that right? I really have no where the "authority" for that is sourced from... I have no experience with this test suite tbh