Add attachable to LandingPage model #10273

Job	Run time
Security Analysis / Run Brakeman	39s
CodeQL SAST scan / Analyze	2m 23s
Dependency Review scan / dependency-review-pr	7s
Lint JavaScript / Run Standardx	13s
Dependency Review scan / dependency-review-push	0s
Lint ERB / Run ERB lint	35s
Prettier / Run Prettier	18s
Lint SCSS / Run Stylelint	18s
Lint Ruby / Run RuboCop	35s
Test features / feature-test-matrix (cucumber:ok)	5m 45s
Test JavaScript / Run Jasmine	40s
Test Ruby / minitest-matrix (4, 0)	2m 16s
Test Ruby / minitest-matrix (4, 1)	2m 27s
Test Ruby / minitest-matrix (4, 2)	3m 30s
Test Ruby / minitest-matrix (4, 3)	3m 10s
Test Ruby / Run Minitest	1s
Test features / Run Cucumber	1s
	22m 58s

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