Consider checking tests in check-only mode

[Aaron1011]

Currently, we only check crates in the workspace for a check-only build:

crater/src/runner/test.rs

Lines 302 to 308 in dcc5456

	&[
	"check",
	"--frozen",
	"--all",
	"--all-targets",
	"--message-format=json",
	],

However, we do not pass --tests, which can cause us to miss some regressions. See rust-lang/rust#77789 (comment)

[ehuss]

The --all-targets flag causes it to check all tests.

I don't think crater missed the regression noted in the link. When crater was ran, try_match 0.2.2 was using these dependencies:

proc-macro2 v1.0.18
version_check v0.9.2
unicode-xid v0.2.0
syn v1.0.31
proc-macro-hack v0.5.16
proc-macro-error-attr v1.0.2
proc-macro-error v1.0.2
quote v1.0.7
syn-mid v0.5.0
try_match_inner v0.2.0

With that set, it builds fine. It's only when you update (I'm not sure which) that the regression happens. So it was just a timing issue.