Describe the bug

There are two issues I discovered

1. On JDK 11, route matcher does not capture the http.route attribute at all. As a result, the span name only encapsulates the HTTP method (e.g. GET).
2. The span name and http.route are neglecting slashes when computing the route.

I've made a draft fix here with all old and new tests passing on both reproduced JDK versions - 149f216

Steps to reproduce

Using updated tests from this fix commit 149f216 pointing to the instrumentation code on main, I'm able to confirm from logs for both cases. On JDK 11, both [1] and [2] are reproducible, and [2] is also reproducible in JDK 21 target.

1. org.opentest4j.AssertionFailedError: [Span 0] Expected span to have name <GET /api/v2/orders/*/status> but was
2. org.opentest4j.AssertionFailedError: [Span 0] Expected span to have name <GET /foo/api/v2/bar/> but was <GET /fooapiv2bar>

Expected behavior

Span names should have been

1. GET /api/v2/orders/*/status
2. GET /foo/api/v2/bar/*

http.route should have been

1. /api/v2/orders/*/status
2. /foo/api/v2/bar/*

Actual behavior

Span names were

1. GET (JDK11)
2. GET /fooapiv2bar* (JDK11 & JDK21)

http.route were

1. Missing completely
2. /fooapiv2bar*

Javaagent or library instrumentation version

2.23.0-alpha-SNAPSHOT

Environment

JDK: JDK 11 for the first issue, JDK 11 and 21 for the second
OS: MacOS 15.5

Additional context

No response

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