moved pkg/hostname to internal/hostname (jaegertracing#6886)

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## Which problem is this PR solving?
- part of jaegertracing#6869

## Description of the changes
- moved `pkg/hostname` to` internal/hostname`

## How was this change tested?
- 

## Checklist
- [ ] I have read
https://github.com/jaegertracing/jaeger/blob/master/CONTRIBUTING_GUIDELINES.md
- [ ] I have signed all commits
- [ ] I have added unit tests for the new functionality
- [ ] I have run lint and test steps successfully
  - for `jaeger`: `make lint test`
  - for `jaeger-ui`: `npm run lint` and `npm run test`

---------

Signed-off-by: danish9039 <[email protected]>
Signed-off-by: hippie-danish <[email protected]>

Author: danish9039

pkg/hostname/hostname.go renamed to internal/hostname/hostname.go

@@ -11,11 +11,11 @@ import (
 	"go.uber.org/zap"
 
 	span_model "github.com/jaegertracing/jaeger-idl/model/v1"
+	"github.com/jaegertracing/jaeger/internal/hostname"
 	"github.com/jaegertracing/jaeger/internal/leaderelection"
 	"github.com/jaegertracing/jaeger/internal/sampling/samplingstrategy"
 	"github.com/jaegertracing/jaeger/internal/storage/v1/api/samplingstore"
 	"github.com/jaegertracing/jaeger/internal/storage/v1/api/samplingstore/model"
-	"github.com/jaegertracing/jaeger/pkg/hostname"
 	"github.com/jaegertracing/jaeger/pkg/metrics"
 )
 

pkg/hostname/hostname_test.go renamed to internal/hostname/hostname_test.go

@@ -15,6 +15,7 @@ import (
 	"go.opentelemetry.io/otel/trace"
 	"go.uber.org/zap"
 
+	"github.com/jaegertracing/jaeger/internal/hostname"
 	cLock "github.com/jaegertracing/jaeger/internal/storage/distributedlock/cassandra"
 	"github.com/jaegertracing/jaeger/internal/storage/v1"
 	"github.com/jaegertracing/jaeger/internal/storage/v1/api/dependencystore"
@@ -30,7 +31,6 @@ import (
 	"github.com/jaegertracing/jaeger/pkg/cassandra/config"
 	gocqlw "github.com/jaegertracing/jaeger/pkg/cassandra/gocql"
 	"github.com/jaegertracing/jaeger/pkg/distributedlock"
-	"github.com/jaegertracing/jaeger/pkg/hostname"
 	"github.com/jaegertracing/jaeger/pkg/metrics"
 )