[feature]: Support AWS Signature 4 authentication - SignV4

### Tell us about the problem you're trying to solve

AWS Signature 4 authentication is required when infrastructure integrates with AWS services like CloudWatch.
Signature 4 authentication algorithm iterates http request data over several hash steps to produce authorization token. AWS Service side validates token by running request details through samealgorithm.

Implementation reference
https://docs.aws.amazon.com/IAM/latest/UserGuide/reference_sigv-create-signed-request.html

### Describe the solution you’d like

Expectation:
we can send open telemetry logs directly to CloudWatch OTLP endpoints

### Describe the alternative you’ve considered or used

Only alternative is instalation and configuration (which is difficult) of AWS OTLP Collector Java Agent.

### Additional context

Provide new bean that activates on HTTP-AWS:
```@Bean
@ConditionalOnProperty(name = "management.opentelemetry.logging.export.otlp.transport", havingValue = "http",
matchIfMissing = true)
OtlpHttpLogRecordExporter otlpHttpLogRecordExporter(OtlpLoggingProperties properties,
OtlpLoggingConnectionDetails connectionDetails, ObjectProvider meterProvider) {
````
We will activate custom exporter that generates Signature 4

Can we intercept request? Here is stack:
````
2026-04-09T14:44:53.974+02:00 ERROR 34186 --- [server-app] [alhost:4318/...] i.o.exporter.internal.http.HttpExporter : Too many log messages detected. Will only log 1 time(s) per minute from now on.
2026-04-09T14:44:53.974+02:00 ERROR 34186 --- [server-app] [alhost:4318/...] i.o.exporter.internal.http.HttpExporter : Failed to export logs. The request could not be executed. Full error message: Failed to connect to localhost/[0:0:0:0:0:0:0:1]:4318

java.net.ConnectException: Failed to connect to localhost/[0:0:0:0:0:0:0:1]:4318
at okhttp3.internal.connection.RealConnection.connectSocket(RealConnection.kt:297)
at okhttp3.internal.connection.RealConnection.connect(RealConnection.kt:207)
at okhttp3.internal.connection.ExchangeFinder.findConnection(ExchangeFinder.kt:226)
at okhttp3.internal.connection.ExchangeFinder.findHealthyConnection(ExchangeFinder.kt:106)
at okhttp3.internal.connection.ExchangeFinder.find(ExchangeFinder.kt:74)
at okhttp3.internal.connection.RealCall.initExchange$okhttp(RealCall.kt:255)
at okhttp3.internal.connection.ConnectInterceptor.intercept(ConnectInterceptor.kt:32)
at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.kt:109)
at okhttp3.internal.cache.CacheInterceptor.intercept(CacheInterceptor.kt:95)
at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.kt:109)
at okhttp3.internal.http.BridgeInterceptor.intercept(BridgeInterceptor.kt:83)
at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.kt:109)
at okhttp3.internal.http.RetryAndFollowUpInterceptor.intercept(RetryAndFollowUpInterceptor.kt:76)
at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.kt:109)
at io.opentelemetry.exporter.sender.okhttp.internal.RetryInterceptor.intercept(RetryInterceptor.java:96)
at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.kt:109)
at okhttp3.internal.connection.RealCall.getResponseWithInterceptorChain$okhttp(RealCall.kt:201)
at okhttp3.internal.connection.RealCall$AsyncCall.run(RealCall.kt:517)
at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1090)
at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:614)
at java.base/java.lang.Thread.run(Thread.java:1474)
Suppressed: java.net.ConnectException: Failed to connect to localhost/127.0.0.1:4318
... 21 common frames omitted
Caused by: java.net.ConnectException: Connection refused
at java.base/sun.nio.ch.Net.pollConnect(Native Method)
at java.base/sun.nio.ch.Net.pollConnectNow(Net.java:639)
at java.base/sun.nio.ch.NioSocketImpl.timedFinishConnect(NioSocketImpl.java:550)
at java.base/sun.nio.ch.NioSocketImpl.connect(NioSocketImpl.java:594)
at java.base/java.net.SocksSocketImpl.connect(SocksSocketImpl.java:284)
at java.base/java.net.Socket.connect(Socket.java:659)
at okhttp3.internal.platform.Platform.connectSocket(Platform.kt:128)
at okhttp3.internal.connection.RealConnection.connectSocket(RealConnection.kt:295)
... 20 common frames omitted
Caused by: java.net.ConnectException: Connection refused
at java.base/sun.nio.ch.Net.pollConnect(Native Method)
at java.base/sun.nio.ch.Net.pollConnectNow(Net.java:639)
at java.base/sun.nio.ch.NioSocketImpl.timedFinishConnect(NioSocketImpl.java:550)
at java.base/sun.nio.ch.NioSocketImpl.connect(NioSocketImpl.java:594)
at java.base/java.net.SocksSocketImpl.connect(SocksSocketImpl.java:284)
at java.base/java.net.Socket.connect(Socket.java:659)
at okhttp3.internal.platform.Platform.connectSocket(Platform.kt:128)
at okhttp3.internal.connection.RealConnection.connectSocket(RealConnection.kt:295)
... 20 common frames omitted
````