Allow for unexpcted version names in checks & remediations

Summary:
Upgrading from a wiped bletchley fails, due to image version name validation in flashy checks and remediations
```
2024-03-13 02:41:18.275510 - Unsafe to reboot error: "Unable to parse version info: No match for regex 'bletchley-v(?P<year>[0-9]+).(?P<week>[0-9]+)' for input 'bletchley-9e5605ae7d-dirty'".
```
We should allow for Flashy to upgrade from versions without a `vYYYY.WW.N` version tag, such as the OSS image build or locally built versions, and only proceed to the year check if it's an actual date tagged version

Test Plan:
Test upgrade from same device:
```
$ oobgrader --host macbmc5r0034p0049-oob.02.pci1.facebook.com --fbpkg-name openbmc.image.bletchley:weeklybuild --flashy-tag e44d3bf --wait

Host                                        Workflow ID                           Progress    Status                   Result
------------------------------------------  ------------------------------------  ----------  -----------------------  ----------------------
macbmc5r0034p0049-oob.02.pci1.facebook.com  44c2f034-d1ae-4bc3-b692-40c17113f1ac  finished    WorkflowStatus.FINISHED  FinishStatus.SUCCEEDED
```
Test upgrade on wedge100 to ensure normal behaviour
```
$ oobgrader --host fboss8382003.snc1 --primary-only --wait --force --flashy-tag e44d3bf --allow-downgrade

Host                   Workflow ID                           Progress    Status                   Result
---------------------  ------------------------------------  ----------  -----------------------  ----------------------
fboss8382003-oob.snc1  647a8025-e0c2-4977-8208-dbede581f229  finished    WorkflowStatus.FINISHED  FinishStatus.SUCCEEDED
```
 ---
Unit tests:
```
~/local/openbmc/tools/flashy (flashy-reg)]$ ./scripts/run_unit_tests.sh

141/141 unit tests passed
```

Reviewed By: doranand

Differential Revision: D54872760

fbshipit-source-id: 0952d175e12fb9c9e958db9563267e40cadaab1f

tools/flashy/checks_and_remediations/bletchley/00_check_version.go

@@ -20,6 +20,8 @@
 package remediations_bletchley
 
 import (
+	"log"
+	"strings"
 	"strconv"
 
 	"github.com/facebook/openbmc/tools/flashy/lib/step"
@@ -41,8 +43,13 @@ func checkVersion(stepParams step.StepParams) step.StepExitError {
 	const re = `bletchley-v(?P<year>[0-9]+).(?P<week>[0-9]+)`
 	versionMap, err := utils.GetRegexSubexpMap(re, version)
 	if err != nil {
-		errMsg := errors.Errorf("Unable to parse version info: %v", err)
-		return step.ExitUnsafeToReboot{Err: errMsg}
+		if strings.HasPrefix(version, "bletchley-") {
+			log.Printf("Upgrading from dirty version. Skipping year check")
+			return nil
+		} else {
+			errMsg := errors.Errorf("Unable to parse version info: %v", err)
+			return step.ExitUnsafeToReboot{Err: errMsg}
+		}
 	}
 
 	year, err := strconv.Atoi(versionMap["year"])

tools/flashy/checks_and_remediations/bletchley/00_check_version_test.go

@@ -53,6 +53,18 @@ func TestCheckVersion(t *testing.T) {
 			err:       nil,
 			want:      nil,
 		},
+		{
+			name:      "bitbaked",
+			version:   "bletchley-123abc",
+			err:       nil,
+			want:      nil,
+		},
+		{
+			name:      "dirty",
+			version:   "bletchley-123abc-dirty",
+			err:       nil,
+			want:      nil,
+		},
 		{
 			name:      "garbage",
 			version:   "garbage",