Fix warnings from super project build

such as

```
/home/rmatev/stackm/Gaudi/GaudiKernel/include/Gaudi/Property.h:203:22:
warning: comparison of integer expressions of different signedness:
'const StorageType' {aka 'const unsigned int'} and 'const int'
[-Wsign-compare]
  203 |       return m_value == other;
      |              ~~~~~~~~^~~~~~~~
```

Event/EventPacker/src/component/BufferPackerBaseAlg.h

@@ -56,7 +56,7 @@ namespace DataPacking::Buffer {
       // if ( this->msgLevel( MSG::DEBUG ) ) this->debug() << "Input location " << m_data << " empty." << endmsg;
       // return {0};
       //}
-      if ( m_encodingKey == 0 ) {
+      if ( m_encodingKey == 0u ) {
         throw GaudiException( "encoding key is zero", __PRETTY_FUNCTION__, StatusCode::FAILURE );
         ++m_zero_key;
       }

Event/EventPacker/src/component/BufferRelationPackerBaseAlg.h

@@ -101,7 +101,7 @@ namespace DataPacking::Buffer {
       buffer.reserve( prels->data().size() );
 
       static const Gaudi::StringKey PackedObjectLocations{"PackedObjectLocations"};
-      if ( m_encodingKey == 0 ) ++m_zero_key;
+      if ( m_encodingKey == 0u ) ++m_zero_key;
       const auto& map  = m_annsvc->s2i( m_encodingKey, PackedObjectLocations );
       auto        iloc = map.find( m_rels.fullKey().key() );
       if ( iloc == map.end() ) {

Hlt/HltDAQ/src/component/HltDecReportsDecoder.cpp

@@ -158,11 +158,12 @@ namespace LHCb::Hlt::DAQ {
       outputSummary.setTaskID( pop( data ) );
     }
     // --------------------------------- get configuration --------------------
-    if ( key != 0 && m_forcedKey != 0 ) ++m_overrule_nonzero_key;
+    if ( key != 0 && m_forcedKey != 0u ) ++m_overrule_nonzero_key;
     if ( key == 0 ) key = outputSummary.configuredTCK();
-    if ( key == 0 && m_forcedKey == 0 ) ++m_not_overruled_zero_key;
+    if ( key == 0 && m_forcedKey == 0u ) ++m_not_overruled_zero_key;
 
-    const auto& tbl = m_svc->i2s( m_forcedKey == 0 ? key : m_forcedKey.value(), selectionID_for( m_sourceID.value() ) );
+    const auto& tbl =
+        m_svc->i2s( m_forcedKey == 0u ? key : m_forcedKey.value(), selectionID_for( m_sourceID.value() ) );
 
     // ---------------- loop over decisions in the bank body; insert them into the output container
     int err = 0;

Hlt/HltDAQ/src/component/HltPackedBufferDecoder.cpp

@@ -114,7 +114,6 @@ namespace LHCb::Hlt::DAQ {
         if ( msgLevel( MSG::DEBUG ) ) {
           debug() << "Rawbank size " << rawBank->size() << endmsg;
           debug() << "Payload size " << payload.size() << endmsg;
-          debug() << "Compression " << compression << endmsg;
         }
       }