[Infra] Limit concurrent matrix jobs in 'spm' jobs (#13679)

Author: ncooke3

.github/workflows/abtesting.yml

@@ -50,6 +50,7 @@ jobs:
     # Don't run on private repo unless it is a PR.
     if: (github.repository == 'Firebase/firebase-ios-sdk' && github.event_name == 'schedule') || github.event_name == 'pull_request'
     strategy:
+      max-parallel: 1
       matrix:
         target: [iOS, tvOS, macOS, catalyst, watchOS]
         os: [macos-13, macos-14]

.github/workflows/appdistribution.yml

@@ -46,6 +46,7 @@ jobs:
     if: (github.repository == 'Firebase/firebase-ios-sdk' && github.event_name == 'schedule') || github.event_name == 'pull_request'
 
     strategy:
+      max-parallel: 1
       matrix:
         os: [macos-14, macos-13]
         include:

.github/workflows/auth.yml

@@ -103,6 +103,7 @@ jobs:
     # Don't run on private repo unless it is a PR.
     if: (github.repository == 'Firebase/firebase-ios-sdk' && github.event_name == 'schedule') || github.event_name == 'pull_request'
     strategy:
+      max-parallel: 1
       matrix:
         target: [iOS, tvOS, macOS, catalyst, watchOS]
         os: [macos-13, macos-14]

.github/workflows/core.yml

@@ -43,6 +43,7 @@ jobs:
     # Don't run on private repo unless it is a PR.
     if: (github.repository == 'Firebase/firebase-ios-sdk' && github.event_name == 'schedule') || github.event_name == 'pull_request'
     strategy:
+      max-parallel: 1
       matrix:
         target: [iOS, tvOS, macOS, catalyst, watchOS]
         os: [macos-13, macos-14]

.github/workflows/core_internal.yml

@@ -39,6 +39,7 @@ jobs:
     # Don't run on private repo unless it is a PR.
     if: (github.repository == 'Firebase/firebase-ios-sdk' && github.event_name == 'schedule') || github.event_name == 'pull_request'
     strategy:
+      max-parallel: 1
       matrix:
         target: [iOS, tvOS, macOS, catalyst, watchOS]
         os: [macos-13, macos-14]

.github/workflows/crashlytics.yml

@@ -57,6 +57,7 @@ jobs:
     # Don't run on private repo unless it is a PR.
     if: (github.repository == 'Firebase/firebase-ios-sdk' && github.event_name == 'schedule') || github.event_name == 'pull_request'
     strategy:
+      max-parallel: 1
       matrix:
         target: [iOS, tvOS, macOS, catalyst, watchOS]
         os: [macos-13, macos-14]

.github/workflows/database.yml

@@ -68,6 +68,7 @@ jobs:
     # Don't run on private repo unless it is a PR.
     if: (github.repository == 'Firebase/firebase-ios-sdk' && github.event_name == 'schedule') || github.event_name == 'pull_request'
     strategy:
+      max-parallel: 1
       matrix:
         target: [iOS, tvOS, macOS, catalyst, watchOS]
         os: [macos-13, macos-14]

.github/workflows/dynamiclinks.yml

@@ -43,6 +43,7 @@ jobs:
     # Don't run on private repo unless it is a PR.
     if: (github.repository == 'Firebase/firebase-ios-sdk' && github.event_name == 'schedule') || github.event_name == 'pull_request'
     strategy:
+      max-parallel: 1
       matrix:
         os: [macos-14, macos-13]
         include:

.github/workflows/firebase_app_check.yml

@@ -100,6 +100,7 @@ jobs:
     # Don't run on private repo unless it is a PR.
     if: (github.repository == 'Firebase/firebase-ios-sdk' && github.event_name == 'schedule') || github.event_name == 'pull_request'
     strategy:
+      max-parallel: 1
       matrix:
         target: [iOS, tvOS, macOS, catalyst, watchOS]
         os: [macos-14, macos-13]

.github/workflows/functions.yml

@@ -56,6 +56,7 @@ jobs:
     # Don't run on private repo unless it is a PR.
     if: (github.repository == 'Firebase/firebase-ios-sdk' && github.event_name == 'schedule') || github.event_name == 'pull_request'
     strategy:
+      max-parallel: 1
       matrix:
         os: [macos-14]
         include: