feat: add `--allow-import` flag (#25469)

This replaces `--allow-net` for import permissions and makes the
security sandbox stricter by also checking permissions for statically
analyzable imports.

By default, this has a value of
`--allow-import=deno.land:443,jsr.io:443,esm.sh:443,raw.githubusercontent.com:443,gist.githubusercontent.com:443`,
but that can be overridden by providing a different set of hosts.

Additionally, when no value is provided, import permissions are inferred
from the CLI arguments so the following works because
`fresh.deno.dev:443` will be added to the list of allowed imports:

```ts
deno run -A -r https://fresh.deno.dev
```

---------

Co-authored-by: David Sherret <dsherret@gmail.com>

1 files changed, 0 insertions, 1 deletions

diff --git a/tests/testdata/dynamic_import/permissions_blob_remote.ts b/tests/testdata/dynamic_import/permissions_blob_remote.ts
index 1e2c8c21a..569b1f84c 100644
--- a/tests/testdata/dynamic_import/permissions_blob_remote.ts
+++ b/tests/testdata/dynamic_import/permissions_blob_remote.ts
@@ -1,4 +1,3 @@
-// This file doesn't really exist, but it doesn't matter, a "PermissionsDenied" error should be thrown.
 const code = `import "https://example.com/some/file.ts";`;
 const blob = new Blob([code]);
 await import(URL.createObjectURL(blob));