Bump the opentelemetry-testing group with 6 updates

Bumps OpenTelemetry from 1.14.0 to 1.15.0
Bumps OpenTelemetry.Exporter.InMemory from 1.14.0 to 1.15.0
Bumps OpenTelemetry.Exporter.OpenTelemetryProtocol from 1.14.0 to 1.15.0
Bumps OpenTelemetry.Extensions.Hosting from 1.14.0 to 1.15.0
Bumps OpenTelemetry.Instrumentation.AspNetCore from 1.14.0 to 1.15.0
Bumps OpenTelemetry.Instrumentation.Http from 1.14.0 to 1.15.0

---
updated-dependencies:
- dependency-name: OpenTelemetry
  dependency-version: 1.15.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: opentelemetry-testing
- dependency-name: OpenTelemetry.Exporter.InMemory
  dependency-version: 1.15.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: opentelemetry-testing
- dependency-name: OpenTelemetry.Exporter.OpenTelemetryProtocol
  dependency-version: 1.15.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: opentelemetry-testing
- dependency-name: OpenTelemetry.Extensions.Hosting
  dependency-version: 1.15.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: opentelemetry-testing
- dependency-name: OpenTelemetry.Instrumentation.AspNetCore
  dependency-version: 1.15.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: opentelemetry-testing
- dependency-name: OpenTelemetry.Instrumentation.Http
  dependency-version: 1.15.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: opentelemetry-testing
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

Directory.Packages.props

@@ -74,12 +74,12 @@
     <PackageVersion Include="Microsoft.Extensions.TimeProvider.Testing" Version="10.1.0" />
     <PackageVersion Include="Microsoft.NET.Test.Sdk" Version="18.0.1" />
     <PackageVersion Include="Moq" Version="4.20.72" />
-    <PackageVersion Include="OpenTelemetry" Version="1.14.0" />
-    <PackageVersion Include="OpenTelemetry.Exporter.InMemory" Version="1.14.0" />
-    <PackageVersion Include="OpenTelemetry.Exporter.OpenTelemetryProtocol" Version="1.14.0" />
-    <PackageVersion Include="OpenTelemetry.Instrumentation.Http" Version="1.14.0" />
-    <PackageVersion Include="OpenTelemetry.Extensions.Hosting" Version="1.14.0" />
-    <PackageVersion Include="OpenTelemetry.Instrumentation.AspNetCore" Version="1.14.0" />
+    <PackageVersion Include="OpenTelemetry" Version="1.15.0" />
+    <PackageVersion Include="OpenTelemetry.Exporter.InMemory" Version="1.15.0" />
+    <PackageVersion Include="OpenTelemetry.Exporter.OpenTelemetryProtocol" Version="1.15.0" />
+    <PackageVersion Include="OpenTelemetry.Instrumentation.Http" Version="1.15.0" />
+    <PackageVersion Include="OpenTelemetry.Extensions.Hosting" Version="1.15.0" />
+    <PackageVersion Include="OpenTelemetry.Instrumentation.AspNetCore" Version="1.15.0" />
     <PackageVersion Include="Serilog.Extensions.Hosting" Version="10.0.0" />
     <PackageVersion Include="Serilog.Extensions.Logging" Version="10.0.0" />
     <PackageVersion Include="Serilog.Sinks.Console" Version="6.1.1" />