[feature] Add HTTP QUERY method, formalized as RFC 10008 in June 2026

### Use case

HTTP QUERY method, formalized as RFC 10008 in June 2026.
HTTP QUERY addresses a longstanding limitation in HTTP by combining the body-carrying capability of POST with the safety and idempotency guarantees of GET. It is designed for complex, structured read operations where query string length limits make GET impractical and POST’s non-idempotent semantics are semantically incorrect.

### Possible solution

Add new method QUERY in these files :
src/protocol/http/src/main/java/org/apache/jmeter/protocol/http/util/HTTPConstantsInterface.java
src/protocol/http/src/main/java/org/apache/jmeter/protocol/http/sampler/HTTPSamplerBase.java

### Possible workarounds

_No response_

### JMeter Version

5.6.3

### Java Version

java 17

### OS Version

_No response_

Start by reading HTTPConstantsInterface.java and HTTPSamplerBase.java, then trace how request methods are defined and selected. Verify that QUERY is available wherever HTTP methods are configured and that the sampler can send it; done means the new method is accepted and covered by the relevant existing HTTP sampler checks.

Written by the indexing model from the issue text.