Description

Previously, any configuration element in .ic-assets.json functioned as if a setting of
"allow_raw_access": true were present in the json object.

For example, given the following configuration, all files would be configured
with allow_raw_access set to true, as if the second entry specified
"allow_raw_access": true (which is the default), even though it does not.

[
  {
    "match": "**/*",
    "allow_raw_access": false
  },
  {
    "match": "**/*",
    "headers": {
      "X-Anything": "Something"
    }
  }
]

Now, given the same configuration, all files would be configured with allow_raw_access set to false, as expected.

Note that the default value of allow_raw_access is still true.

Fixes https://dfinity.atlassian.net/browse/SDK-1238

Notes to reviewers:

• the default of true comes from here: https://github.com/dfinity/sdk/blob/master/src/canisters/frontend/ic-asset/src/asset/config.rs#L228
• the removal of the default value from the "asset configuration via .ic-assets.json5 - detect unused config" e2e test was a hint of the problem: the configuration file doesn't specify a value, but it showed up in the output as if it had.

How Has This Been Tested?

Added e2e tests, as well as a unit test from #3434

This PR is broken up into two commits. The first adds the tests, two of which fail. The second

Checklist:

• The title of this PR complies with Conventional Commits.
• I have edited the CHANGELOG accordingly.
• I have made corresponding changes to the documentation.