Tests: Update isAmazonLinux2() logic

The ProcessInfo extension to determine if a host is running on Amazon
Linux 2 was slightly flawed as it did not take into account the
double-quote (") surrounding the values.

Update the logic to look at "PRETTY_NAME" since the ID can be used in
multiple Amazon Linux OS'es, and use a regular expression in the logic.

Author: bkhouri

Sources/_InternalTestSupport/ProcessInfo+hostutils.swift

@@ -22,14 +22,16 @@ extension ProcessInfo {
                 return false
             }
         }
-        let lines = contentString.components(separatedBy: .newlines)
-        for line in lines {
-            if line.starts(with: "ID=") {
-                let id = line.replacingOccurrences(of: "ID=", with: "").trimmingCharacters(in: .whitespacesAndNewlines)
-                if id == "amzn" { // ID for Amazon Linux is "amzn"
+        do {
+            let nameRegex = try Regex("PRETTY_NAME=\"?Amazon Linux 2.*\"?")
+            let lines = contentString.components(separatedBy: .newlines)
+            for line in lines {
+                if line.contains(nameRegex) {
                     return true
                 }
             }
+        } catch {
+            print("Unable to determine if host is Amazon Linux 2")
         }
         return false
     }

Tests/BasicsTests/ProcessInfoTests.swift

@@ -50,10 +50,27 @@ struct ProcessInfoExtensionTests {
         @Test(
             arguments: [
                 (contentUT: "", expected: false),
-                (contentUT: "ID=", expected: false),
-                (contentUT: "ID=foo", expected: false),
-                (contentUT: "ID=amzn", expected: true),
-                (contentUT: " ID=amzn", expected: false),
+                (contentUT: "PRETTY_NAME=", expected: false),
+                (contentUT: "PRETTY_NAME=foo", expected: false),
+                (contentUT: "PRETTY_NAME=amzn", expected: false),
+                (contentUT: "PRETTY_NAME=Amazon Linux 2", expected: true),
+                (contentUT: "PRETTY_NAME=\"Amazon Linux 2\"", expected: true),
+                (contentUT: " PRETTY_NAME=amzn", expected: false),
+                (
+                    contentUT: """
+                        NAME="Amazon Linux"
+                        VERSION="2"
+                        ID="amzn"
+                        ID_LIKE="centos rhel fedora"
+                        VERSION_ID="2"
+                        PRETTY_NAME="Amazon Linux 2"
+                        ANSI_COLOR="0;33"
+                        CPE_NAME="cpe:2.3:o:amazon:amazon_linux:2"
+                        HOME_URL="https://amazonlinux.com/"
+                        SUPPORT_END="2026-06-30"
+                        """,
+                    expected: true
+                )
             ], prefixAndSuffixData,
         )
         fileprivate func isAmazonLinux2ReturnsExpectedValue(