[TASK] Respect the url scheme of configured api url

In a couple of places, `https` has been hardcoded enforced
as request scheme, ignoring the scheme of the configured
api url.

This may seem to be a "security" enforcement, but these
kind of overrides are not very user friendly and hidden
magic is always a pain in the ass for debugging issues.

This change now re-uses the configured api url scheme
when building api requests. One test is adopted to do
the same.

The donated methods on the `Configuration` class to
access api url parts are used for this.

Author: sbuerk

Classes/Client.php

@@ -126,7 +126,8 @@ public function getGlossaryEntries(string $glossaryId): ResponseInterface
     private function buildBaseUrl(string $path): string
     {
         $url = sprintf(
-            'https://%s/%s/%s',
+            '%s://%s/%s/%s',
+            $this->configuration->getApiScheme(),
             $this->configuration->getApiUrl(),
             self::API_VERSION,
             $path

Tests/Functional/ClientTest.php

@@ -410,7 +410,8 @@ protected function tearDown(): void
 
             foreach ($this->glossaryIdStorage as $glossaryId) {
                 $baseUrl = sprintf(
-                    'https://%s/v2/glossaries/%s',
+                    '%s://%s/v2/glossaries/%s',
+                    $configuration->getApiScheme(),
                     $configuration->getApiUrl(),
                     $glossaryId
                 );

Tests/Functional/ConfigurationTest.php

@@ -37,7 +37,15 @@ public function checkApiParseUrlAndGiveOnlyDomain(): void
         if (defined('DEEPL_API_KEY') && getenv('DEEPL_API_KEY') !== '') {
             static::assertSame('api-free.deepl.com', $configuration->getApiUrl());
         } else {
-            static::assertSame('ddev-deepltranslate-deeplmockserver:3000', $configuration->getApiUrl());
+            $parsedUrl = parse_url(
+                $this->configurationToUseInTestInstance['EXTENSIONS']['wv_deepltranslate']['apiUrl']
+                    ?? 'http://ddev-deepltranslate-deeplmockserver:3000'
+            );
+            $checkApiUrl = $parsedUrl['host'] . ($parsedUrl['port'] ? ':' . $parsedUrl['port'] : '');
+            static::assertSame(
+                $checkApiUrl,
+                $configuration->getApiUrl()
+            );
         }
     }
 }