[macOS] move Pester tests to separate files/contexts/describes (#2573)

* [macOS] Fail Pester tests on error

* return it back

* added all files for testing

* common utils path changed

* linux scripts shouldn't be touched

images/macos/tests/OpenSSL.Tests.ps1

@@ -0,0 +1,21 @@
+Describe "OpenSSL" {
+    Context "OpenSSL Version" {
+        It "OpenSSL is available" {
+            "openssl version" | Should -ReturnZeroExitCode
+        }
+    }
+
+    Context "OpenSSL 1.1 Path Check" {
+        It "OpenSSL 1.1 path exists" {
+            $openSSLpath = "/usr/local/opt/openssl@1.1"
+            $openSSLpath | Should -Exist
+        }
+    }
+    
+    Context "OpenSSL 1.1 is default" {
+        It "Default OpenSSL version is 1.1" {
+            $commandResult = Get-CommandResult "openssl version"
+            $commandResult.Output | Should -Match "OpenSSL 1.1"
+        }
+    }
+}