Add attachable to LandingPage model #10275

Job	Run time
Security Analysis / Run Brakeman	32s
Dependency Review scan / dependency-review-pr	3s
Dependency Review scan / dependency-review-push	0s
CodeQL SAST scan / Analyze	2m 17s
Lint ERB / Run ERB lint	34s
Prettier / Run Prettier	12s
Lint Ruby / Run RuboCop	34s
Lint SCSS / Run Stylelint	13s
Test features / feature-test-matrix (cucumber:ok)	5m 17s
Test JavaScript / Run Jasmine	41s
Test Ruby / minitest-matrix (4, 0)	2m 32s
Test Ruby / minitest-matrix (4, 1)	3m 3s
Lint JavaScript / Run Standardx	13s
Test Ruby / minitest-matrix (4, 2)	2m 30s
Test Ruby / minitest-matrix (4, 3)	2m 44s
Test Ruby / Run Minitest	1s
Test features / Run Cucumber	1s
	21m 27s

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