Use project version of ajv-cli in npm:validate task

The ajv-cli command line tool is used for validating data files against their JSON schema.

In general, it is preferable, and for some schemas even mandatory, to use the modern versions of ajv-cli. However,
support for the "Draft-04" schema specification was dropped in ajv-cli version 4.0.0. So when working with JSON schemas
that specify that draft, it is necessary to use ajv-cli 3.3.0, the last compatible version.

Previously, the package.json schema specified the "Draft-04" specification. For this reason, the `npm:validate` task was
configured to use ajv-cli@3.3.0 in that specific task.

The package.json schema has now been updated to use "Draft-07". So the code for using ajv-cli@3.3.0 is removed from the
task, and the standard project level version of ajv-cli will now be used by this task.

Author: per1234

Taskfile.yml

@@ -33,8 +33,6 @@ vars:
   DEFAULT_GO_PACKAGES:
     sh: |
       echo $(cd {{default .DEFAULT_GO_MODULE_PATH .GO_MODULE_PATH}} && go list ./... | tr '\n' ' ' || echo '"ERROR: Unable to discover Go packages"')
-  # Last version of ajv-cli with support for the JSON schema "Draft 4" specification
-  SCHEMA_DRAFT_4_AJV_CLI_VERSION: 3.3.0
 
 tasks:
   # Source: https://github.com/arduino/tooling-project-assets/blob/main/workflow-templates/assets/check-workflows-task/Taskfile.yml
@@ -256,6 +254,8 @@ tasks:
       Validate npm configuration files against their JSON schema.
       Environment variable parameters:
       PROJECT_PATH: Path of the npm-managed project (default: {{.DEFAULT_NPM_PROJECT_PATH}}).
+    deps:
+      - task: npm:install-deps
     vars:
       # Source: https://github.com/SchemaStore/schemastore/blob/master/src/schemas/json/package.json
       SCHEMA_URL: https://json.schemastore.org/package.json
@@ -315,20 +315,23 @@ tasks:
       - wget --quiet --output-document="{{.SEMANTIC_RELEASE_SCHEMA_PATH}}" {{.SEMANTIC_RELEASE_SCHEMA_URL}}
       - wget --quiet --output-document="{{.STYLELINTRC_SCHEMA_PATH}}" {{.STYLELINTRC_SCHEMA_URL}}
       - |
-        cd "{{.WORKING_FOLDER}}"  # Workaround for https://github.com/npm/cli/issues/3210
-        npx ajv-cli@{{.SCHEMA_DRAFT_4_AJV_CLI_VERSION}} validate \
-          --all-errors \
-          -s "{{.SCHEMA_PATH}}" \
-          -r "{{.AVA_SCHEMA_PATH}}" \
-          -r "{{.BASE_SCHEMA_PATH}}" \
-          -r "{{.ESLINTRC_SCHEMA_PATH}}" \
-          -r "{{.JSCPD_SCHEMA_PATH}}" \
-          -r "{{.NPM_BADGES_SCHEMA_PATH}}" \
-          -r "{{.PARTIAL_ESLINT_PLUGINS_PATH}}" \
-          -r "{{.PRETTIERRC_SCHEMA_PATH}}" \
-          -r "{{.SEMANTIC_RELEASE_SCHEMA_PATH}}" \
-          -r "{{.STYLELINTRC_SCHEMA_PATH}}" \
-          -d "{{.PROJECT_FOLDER}}/{{.INSTANCE_PATH}}"
+        npx \
+          --package=ajv-cli \
+          --package=ajv-formats \
+          ajv validate \
+            --all-errors \
+            --strict=false \
+            -s "{{.SCHEMA_PATH}}" \
+            -r "{{.AVA_SCHEMA_PATH}}" \
+            -r "{{.BASE_SCHEMA_PATH}}" \
+            -r "{{.ESLINTRC_SCHEMA_PATH}}" \
+            -r "{{.JSCPD_SCHEMA_PATH}}" \
+            -r "{{.NPM_BADGES_SCHEMA_PATH}}" \
+            -r "{{.PARTIAL_ESLINT_PLUGINS_PATH}}" \
+            -r "{{.PRETTIERRC_SCHEMA_PATH}}" \
+            -r "{{.SEMANTIC_RELEASE_SCHEMA_PATH}}" \
+            -r "{{.STYLELINTRC_SCHEMA_PATH}}" \
+            -d "{{.INSTANCE_PATH}}"
 
   # Source: https://github.com/arduino/tooling-project-assets/blob/main/workflow-templates/assets/poetry-task/Taskfile.yml
   poetry:install-deps: