Add NodeMaxAllocations to client configuration (#25785)

* Set MaxAllocations in client config
Add NodeAllocationTracker struct to Node struct
Evaluate MaxAllocations in AllocsFit function
Set up cli config parsing
Integrate maxAllocs into AllocatedResources view
Co-authored-by: Tim Gross <tgross@hashicorp.com>

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Co-authored-by: Tim Gross <tgross@hashicorp.com>

api/nodes.go

@@ -572,6 +572,7 @@ type Node struct {
 	LastDrain             *DrainMetadata
 	CreateIndex           uint64
 	ModifyIndex           uint64
+	NodeMaxAllocs         int
 }
 
 type NodeResources struct {