chore(lint): switch to import attributes

[caugner]

Summary

Migrates import assertions to import attributes.

Test results and supporting details

Related issues

Part of #25596.

[caugner]

It looks like TypeScript or ts-node converts Import Attributes back to Import Assertions:

file:///home/runner/work/browser-compat-data/browser-compat-data/lint/linter/test-schema.ts:6
import compatDataSchema from './../../schemas/compat-data.schema.json' assert {
                                                                       ^^^^^^

SyntaxError: Unexpected identifier 'assert'
    at compileSourceTextModule (node:internal/modules/esm/utils:338:16)
    at ModuleLoader.moduleStrategy (node:internal/modules/esm/translators:102:18)
    at #translate (node:internal/modules/esm/loader:437:12)
    at ModuleLoader.loadAndTranslate (node:internal/modules/esm/loader:484:27)

[caugner]

The reason for the error seems to be that we're using ts-node with SWC, and ts-node enables two experimental SWC features, keepImportAttributes and emitAssertForImportAttributes, which prevents the use of import attributes, because they're converted to import assertions.

https://github.com/TypeStrong/ts-node/blob/ddb05ef23be92a90c3ecac5a0220435c65ebbd2a/src/transpilers/swc.ts#L248-L251

[Elchi3]

hm, can we fix this by setting "moduleResolution" to "NodeNext" in tsconfig.json?

[caugner]

hm, can we fix this by setting "moduleResolution" to "NodeNext" in tsconfig.json?

No, unfortunately that doesn't make any difference. A solution would be to not use swc for the time being.

[caugner]

Closing in favor of #25603.