LoopAppManager: restore submodule SHAs in diagnostic report

Marion's LoopKit#2399 (b6e8841) added submodule branch+SHA to the build-details
section of the diagnostic report. The script and BuildDetails.submodules
accessor survived the Tidepool merges, but the report-builder block itself
was relocated from DeviceDataManager.swift to LoopAppManager in Tidepool's
refactor, and the merge kept Tidepool's older shape — so the consumer of
.submodules was effectively dropped.

Port the original change into generateDiagnosticReport():
- drop the now-redundant Loop-submodule gitRevision/gitBranch lines
- rename workspaceGit{Revision,Branch} to "Workspace SHA/branch"
- append the submodule list (alphabetized, "name: branch, sha")

Author: Pete Schwamb

Loop/Managers/LoopAppManager.swift

@@ -1049,17 +1049,24 @@ extension LoopAppManager: DiagnosticReportGenerator {
     /// - parameter completion: A closure called once the report has been generated. The closure takes a single argument of the report string.
     func generateDiagnosticReport() async -> String {
 
+        let submodulesInfo = BuildDetails.default.submodules
+            .sorted(by: { $0.key < $1.key })
+            .map { key, value in
+                "*   \(key): \(value.branch), \(value.commitSHA)"
+            }
+            .joined(separator: "\n")
+
         let entries: [String] = [
             "## Build Details",
             "* appNameAndVersion: \(Bundle.main.localizedNameAndVersion)",
             "* profileExpiration: \(BuildDetails.default.profileExpirationString)",
-            "* gitRevision: \(BuildDetails.default.gitRevision ?? "N/A")",
-            "* gitBranch: \(BuildDetails.default.gitBranch ?? "N/A")",
-            "* workspaceGitRevision: \(BuildDetails.default.workspaceGitRevision ?? "N/A")",
-            "* workspaceGitBranch: \(BuildDetails.default.workspaceGitBranch ?? "N/A")",
             "* sourceRoot: \(BuildDetails.default.sourceRoot ?? "N/A")",
             "* buildDateString: \(BuildDetails.default.buildDateString ?? "N/A")",
             "* xcodeVersion: \(BuildDetails.default.xcodeVersion ?? "N/A")",
+            "* Workspace branch: \(BuildDetails.default.workspaceGitBranch ?? "N/A")",
+            "* Workspace SHA: \(BuildDetails.default.workspaceGitRevision ?? "N/A")",
+            "* Submodule name: branch, SHA",
+            "\(submodulesInfo)",
             "",
             "## FeatureFlags",
             "\(FeatureFlags)",