[BUG]: Debug HtmlRenderer: fix SonarCloud reflection warning and closed-resource output #17743

SonarCloud fails the phalcon quality gate on v6.0.x. It reports a vulnerability (phpsecurity:S6173, reflection injection) in HtmlRenderer::getVarDump(). This is a false positive: the ReflectionMethod call runs only for objects, and request data cannot be an object.

There is also a difference between the two projects. When an argument array holds a closed resource, getArrayDump() prints resource (closed) in phalcon and Resource id #N in cphalcon.

Changes (phalcon and cphalcon):

• Move the object branch of getVarDump() into a new private method, dumpObject(object $variable).
• Move the dump() method check into a new private method, canCallDump(object $variable).
• phalcon only: a closed resource in getArrayDump() now prints Resource id #N, the same as cphalcon.
• Add a test for a closed resource in HtmlRendererTest::testVarDumpAndArrayDumpBranches. The test file is now the same in both projects.