Update to macOS 15 on GHA runners (#3753)

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Task/Issue URL:
https://app.asana.com/0/414709148257752/1208999496624718/f
Tech Design URL:
CC:

**Description**:

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**Definition of Done (Internal Only)**:

* [ ] Does this PR satisfy our [Definition of
Done](https://app.asana.com/0/1202500774821704/1207634633537039/f)?

**Copy Testing**:

* [ ] Use of correct apostrophes in new copy, ie `’` rather than `'`

**Orientation Testing**:

* [ ] Portrait
* [ ] Landscape

**Device Testing**:

* [ ] iPhone SE (1st Gen)
* [ ] iPhone 8
* [ ] iPhone X
* [ ] iPhone 14 Pro
* [ ] iPad

**OS Testing**:

* [ ] iOS 15
* [ ] iOS 16
* [ ] iOS 17

**Theme Testing**:

* [ ] Light theme
* [ ] Dark theme

---
###### Internal references:
[Software Engineering
Expectations](https://app.asana.com/0/59792373528535/199064865822552)
[Technical Design
Template](https://app.asana.com/0/59792373528535/184709971311943)

.github/workflows/adhoc.yml

@@ -21,7 +21,7 @@ on:
 
 jobs:
   make-adhoc:
-    runs-on: macos-15
+    runs-on: macos-15-xlarge
     name: Make ad-hoc build
 
     steps:

.github/workflows/alpha.yml

@@ -31,7 +31,7 @@ on:
 
 jobs:
   make-alpha:
-    runs-on: macos-14-xlarge
+    runs-on: macos-15-xlarge
     name: Make TestFlight Alpha Build
     timeout-minutes: 30
 

.github/workflows/end-to-end.yml

@@ -8,7 +8,7 @@ on:
 jobs:
   build-end-to-end-tests:
     name: Build End to End Tests
-    runs-on: macos-14-xlarge
+    runs-on: macos-15-xlarge
     timeout-minutes: 30
 
     steps:
@@ -68,7 +68,7 @@ jobs:
   end-to-end-tests:
     name: End to end Tests
     needs: build-end-to-end-tests
-    runs-on: macos-14
+    runs-on: macos-15
     timeout-minutes: 90
     strategy:
       matrix:

.github/workflows/nightly.yml

@@ -7,7 +7,7 @@ on:
 jobs:
   atb-ui-tests:
     name: ATB UI Tests
-    runs-on: macos-14-xlarge
+    runs-on: macos-15-xlarge
     timeout-minutes: 30
 
     steps:
@@ -68,7 +68,7 @@ jobs:
 
   fingerprinting-ui-tests:
     name: Fingerprinting UI Tests
-    runs-on: macos-14-xlarge
+    runs-on: macos-15-xlarge
     timeout-minutes: 30
 
     steps:

.github/workflows/promote_testflight.yml

@@ -5,7 +5,7 @@ on:
 
 jobs:
   promote-testflight-to-appstore:
-    runs-on: macos-14
+    runs-on: macos-15
 
     steps:
     - name: Check out the code

.github/workflows/release.yml

@@ -27,7 +27,7 @@ on:
 jobs:
   make-release:
     if: github.event.action == 0 || (github.event.pull_request.merged == true && contains(github.event.pull_request.labels.*.name, 'Merge triggers release')) # empty string returns 0; for case when workflow is triggered manually
-    runs-on: macos-14-xlarge
+    runs-on: macos-15-xlarge
     name: Make App Store Connect Release
 
     steps:

.github/workflows/sync-end-to-end.yml

@@ -8,7 +8,7 @@ on:
 jobs:
   build-for-sync-end-to-end-tests:
     name: Build for Sync End To End Tests
-    runs-on: macos-14-xlarge
+    runs-on: macos-15-xlarge
     timeout-minutes: 30
 
     steps:
@@ -68,7 +68,7 @@ jobs:
   sync-end-to-end-tests:
     name: Sync End To End Tests
     needs: build-for-sync-end-to-end-tests
-    runs-on: macos-14
+    runs-on: macos-15
     timeout-minutes: 90
     strategy:
       matrix: