Fix eslint parsing errors, remove eslint-plugin-html (#20323)

Introduce a separate .eslintrc in the Vue components folder to
selectively enable vue-eslint-parser there, so that the rest of the
files can use eslint's core parser which can deal with hashbangs.

The fact that the eslint-disable comments worked in HTML was a
unintended side-effect of the files being parsed via vue-eslint-parser,
so I had to disable the parsing of these files in .eslintrc.yaml to make
it work, and finally decided to remove eslint-plugin-html as it causes
more issues than it solves.

web_src/js/components/.eslintrc.yaml

@@ -0,0 +1,16 @@
+plugins:
+  - eslint-plugin-vue
+
+extends:
+  - ../../../.eslintrc.yaml
+  - plugin:vue/recommended
+
+env:
+  browser: true
+
+rules:
+  vue/attributes-order: [0]
+  vue/component-definition-name-casing: [0]
+  vue/html-closing-bracket-spacing: [0]
+  vue/max-attributes-per-line: [0]
+  vue/one-component-per-file: [0]