Add post merge Swift CI support for swift-format

Author: shahmishal

.swiftci/5_10_ubuntu2204

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+LinuxSwiftPackageJob {
+    swift_version_tag = "5.10-jammy"
+    repo = "swift-format"
+    branch = "main"
+}

.swiftci/5_7_ubuntu2204

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+LinuxSwiftPackageJob {
+    swift_version_tag = "5.7-jammy"
+    repo = "swift-format"
+    branch = "main"
+}

.swiftci/5_8_ubuntu2204

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+LinuxSwiftPackageJob {
+    swift_version_tag = "5.8-jammy"
+    repo = "swift-format"
+    branch = "main"
+}

.swiftci/5_9_ubuntu2204

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+LinuxSwiftPackageJob {
+    swift_version_tag = "5.9-jammy"
+    repo = "swift-format"
+    branch = "main"
+}

.swiftci/nightly_6_0_macos

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+macOSSwiftPackageJob {
+    swift_version = "6.0"
+    repo = "swift-format"
+    branch = "main"
+}

.swiftci/nightly_6_0_ubuntu2204

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+LinuxSwiftPackageJob {
+    nightly_docker_tag = "nightly-6.0-jammy"
+    repo = "swift-format"
+    branch = "main"
+}

.swiftci/nightly_main_macos

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+macOSSwiftPackageJob {
+    swift_version = "main"
+    repo = "swift-format"
+    branch = "main"
+}

.swiftci/nightly_main_ubuntu2204

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+LinuxSwiftPackageJob {
+    nightly_docker_tag = "nightly-jammy"
+    repo = "swift-format"
+    branch = "main"
+}

.swiftci/nightly_main_windows

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+WindowsSwiftPackageWithDockerImageJob {
+    docker_image = "swiftlang/swift:nightly-windowsservercore-1809"
+    repo = "swift-format"
+    branch = "main"
+    sub_dir = "swift-collections"
+    label = "windows-server-2019"
+}