Two-way binding to expressions involving {#await} thens should be disallowed by compiler

[Conduitry]

Describe the bug
What the title says. See #3912 and #4008 for why this is a problem.

Logs
n/a

To Reproduce
See #3912 and #4008 for examples of code that we should disallow.

Expected behavior
Two-way binding between (inputs or component props) and (the then of an {#await} or any expression based on that) should throw an error refusing to compile.

Stacktraces
n/a

Severity
Minor-ish. It's evidently caused some confusion.

Additional context
None.

[Conduitry]

Disallowed as of 3.17.2.