It contains a clippy issue, and there's no need for this macro anyway.

Rewrite "testPerm" helper function used for testing of internal 
runtime code. It's been renamed to "unitTest" and provides API that
is extensible in the future by accepting optional "UnitTestOptions" 
argument. "test" helper was also removed and replaced by
overloaded version of "unitTest" that takes only function argument.

"UnitTestOptions" currently supports "perms" and "skip"
options, where former works exactly as first argument to "testPerm"
did, while the latter allows to conditionally skip tests. 

Fixes #4234

* add "assertOps" test assertion which makes sure test case
  is not "leaking" ops - ie. after test finishes there are no 
  pending async ops

* apply "assertOps" to all tests in "cli/js/"

* fix numerous tests leaking ops

* document problem with edge case in "clearInterval"
   and "clearTimeout" implementation where they
   may leak async ops

* move "cli/js/worker_test.ts" to "cli/tests/worker_test.ts" and 
  run as integration test; workers leak ops because of missing
  "terminate" implementation

Co-authored-by: NBartek Iwańczuk <biwanczuk@gmail.com>

Fixes #4602

We turned off `allowJs` by default, to keep the compiler from grabbing
a bunch of files that it wouldn't actually do anything useful with.  On
the other hand, this caused problems with bundles, where the compiler
needs to gather all the dependencies, including JavaScript ones.  This
fixes this so that when we are bundling, we analyse JavaScript imports
in the compiler.

* Rename MkdirOption interface to MkdirOptions

It was hard to remember which Options interfaces were spelled in the
singular and which in the plural (and anyway this one contained two
options).

Also added MkdirOptions to cli/js/deno.ts. All the analogous interfaces
were exported there.

* Rename RemoveOption interface to RemoveOptions

This was the last remaining Option interface spelled in the singular.
Easier to remember if they're all Option**s**; plus we may want to add extra
options here later.

* rename structures related to ES Modules; add "Modules" prefix
* remove unneeded Unpin trait requirement for "ModuleLoader"

Flattens dispatch error handling to produce one less useless stack frame on op errors.

This reverts commit 0eb91c55.

Add original URL to metadata. This is so the VS Code Plugin can reverse
look up the URL for cache entries. Ref #4069.

The V8 documentation explicitly states that SnapshotCreator::CreateBlob()
should not be called from within a HandleScope.

Additionally, this patch removes some non-functional error handling code
from the deno_core::Isolate::snapshot() method.