[JENKINS-56926] Restore support of Jenkinsfile located in subdirectory (#180)

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- [x] Make sure you are requesting to **pull a topic/feature/bugfix branch** (right side) and not your master branch!

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- [x] Link to relevant GitHub issues or pull requests

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- [x] Did you provide a test-case? That demonstrates feature works or fixes the issue.

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### Description

Addressing regression introduced by brainbeanapps@868676d in version 2.4.3 (https://issues.jenkins-ci.org/browse/JENKINS-56926)

Author: alexey-pelykh

src/main/java/com/cloudbees/jenkins/plugins/bitbucket/client/BitbucketCloudApiClient.java

@@ -54,6 +54,7 @@
 import com.cloudbees.jenkins.plugins.bitbucket.filesystem.BitbucketSCMFile;
 import com.cloudbees.plugins.credentials.common.StandardUsernamePasswordCredentials;
 import com.damnhandy.uri.template.UriTemplate;
+import com.damnhandy.uri.template.impl.Operator;
 import com.fasterxml.jackson.core.type.TypeReference;
 import edu.umd.cs.findbugs.annotations.CheckForNull;
 import edu.umd.cs.findbugs.annotations.NonNull;
@@ -387,11 +388,11 @@ public void postCommitComment(@NonNull String hash, @NonNull String comment) thr
     @Override
     public boolean checkPathExists(@NonNull String branchOrHash, @NonNull String path)
             throws IOException, InterruptedException {
-        String url = UriTemplate.fromTemplate(REPO_URL_TEMPLATE + "/src{/branchOrHash,path}")
+        String url = UriTemplate.fromTemplate(REPO_URL_TEMPLATE + "/src{/branchOrHash,path*}")
                 .set("owner", owner)
                 .set("repo", repositoryName)
                 .set("branchOrHash", branchOrHash)
-                .set("path", path)
+                .set("path", path.split(Operator.PATH.getSeparator()))
                 .expand();
         int status = headRequestStatus(url);
         if (HttpStatus.SC_OK == status) {

src/main/java/com/cloudbees/jenkins/plugins/bitbucket/server/client/BitbucketServerAPIClient.java

@@ -147,7 +147,7 @@ public BitbucketCommit call() throws Exception {
     private static final String API_PULL_REQUESTS_PATH = API_REPOSITORY_PATH + "/pull-requests{?start,limit,at,direction,state}";
     private static final String API_PULL_REQUEST_PATH = API_REPOSITORY_PATH + "/pull-requests/{id}";
     private static final String API_PULL_REQUEST_MERGE_PATH = API_REPOSITORY_PATH + "/pull-requests/{id}/merge";
-    static final String API_BROWSE_PATH = API_REPOSITORY_PATH + "/browse/{+path}{?at}";
+    static final String API_BROWSE_PATH = API_REPOSITORY_PATH + "/browse{/path*}{?at}";
     private static final String API_COMMITS_PATH = API_REPOSITORY_PATH + "/commits{/hash}";
     private static final String API_PROJECT_PATH = API_BASE_PATH + "/projects/{owner}";
     private static final String API_COMMIT_COMMENT_PATH = API_REPOSITORY_PATH + "/commits{/hash}/comments";

src/test/java/com/cloudbees/jenkins/plugins/bitbucket/server/client/BitbucketServerAPIClientTest.java

@@ -1,6 +1,7 @@
 package com.cloudbees.jenkins.plugins.bitbucket.server.client;
 
 import com.damnhandy.uri.template.UriTemplate;
+import com.damnhandy.uri.template.impl.Operator;
 import org.junit.Assert;
 import org.junit.Test;
 
@@ -14,7 +15,7 @@ public void repoBrowsePathFolder() {
             .fromTemplate(API_BROWSE_PATH)
             .set("owner", "test")
             .set("repo", "test")
-            .set("path", "folder/Jenkinsfile")
+            .set("path", "folder/Jenkinsfile".split(Operator.PATH.getSeparator()))
             .set("at", "fix/test")
             .expand();
         Assert.assertEquals("/rest/api/1.0/projects/test/repos/test/browse/folder/Jenkinsfile?at=fix%2Ftest", expand);
@@ -26,7 +27,7 @@ public void repoBrowsePathFile() {
             .fromTemplate(API_BROWSE_PATH)
             .set("owner", "test")
             .set("repo", "test")
-            .set("path", "Jenkinsfile")
+            .set("path", "Jenkinsfile".split(Operator.PATH.getSeparator()))
             .expand();
         Assert.assertEquals("/rest/api/1.0/projects/test/repos/test/browse/Jenkinsfile", expand);
     }