fix invalidations from loading Static.jl (#46761)

* improve type stability of `sort!(v::AbstractVector, lo::Integer, hi::Integer, ::InsertionSortAlg, o::Ordering)`
* improve type stability of `fmt(buf, pos, arg, spec::Spec{T}) where {T <: Strings}`

This fixes some invalidations when loading Static.jl.

(cherry picked from commit 9b1780d)

base/sort.jl

@@ -496,7 +496,8 @@ const SMALL_ALGORITHM  = InsertionSort
 const SMALL_THRESHOLD  = 20
 
 function sort!(v::AbstractVector, lo::Integer, hi::Integer, ::InsertionSortAlg, o::Ordering)
-    @inbounds for i = lo+1:hi
+    lo_plus_1 = (lo + 1)::Integer
+    @inbounds for i = lo_plus_1:hi
         j = i
         x = v[i]
         while j > lo

stdlib/Printf/src/Printf.jl

@@ -242,7 +242,7 @@ end
 @inline function fmt(buf, pos, arg, spec::Spec{T}) where {T <: Strings}
     leftalign, hash, width, prec = spec.leftalign, spec.hash, spec.width, spec.precision
     str = string(arg)
-    slen = textwidth(str) + (hash ? arg isa AbstractString ? 2 : 1 : 0)
+    slen = textwidth(str)::Int + (hash ? arg isa AbstractString ? 2 : 1 : 0)
     op = p = prec == -1 ? slen : min(slen, prec)
     if !leftalign && width > p
         for _ = 1:(width - p)