[FIR] Add FirCheckNotNullCall converted to CHECK_NOT_NULL intrinsic

function call.

compiler/testData/codegen/box/ieee754/explicitCompareCall.kt

@@ -1,4 +1,3 @@
-// IGNORE_BACKEND_FIR: JVM_IR
 fun less1(a: Double, b: Double) = a.compareTo(b) == -1
 
 fun less2(a: Double?, b: Double?) = a!!.compareTo(b!!) == -1

compiler/testData/codegen/box/ieee754/explicitEqualsCall.kt

@@ -1,4 +1,3 @@
-// IGNORE_BACKEND_FIR: JVM_IR
 fun equals1(a: Double, b: Double) = a.equals(b)
 
 fun equals2(a: Double?, b: Double?) = a!!.equals(b!!)

compiler/testData/codegen/box/ieee754/greaterDouble_properIeeeComparisons.kt

@@ -1,5 +1,4 @@
 // !LANGUAGE: +ProperIeee754Comparisons
-// IGNORE_BACKEND_FIR: JVM_IR
 
 fun greater1(a: Double, b: Double) = a > b
 

compiler/testData/codegen/box/ieee754/greaterFloat_properIeeeComparisons.kt

@@ -1,5 +1,4 @@
 // !LANGUAGE: +ProperIeee754Comparisons
-// IGNORE_BACKEND_FIR: JVM_IR
 
 fun greater1(a: Float, b: Float) = a > b
 

compiler/testData/codegen/box/ieee754/lessDouble_properIeeeComparisons.kt

@@ -1,5 +1,4 @@
 // !LANGUAGE: +ProperIeee754Comparisons
-// IGNORE_BACKEND_FIR: JVM_IR
 
 fun less1(a: Double, b: Double) = a < b
 

compiler/testData/codegen/box/ieee754/lessFloat_properIeeeComparisons.kt

@@ -1,5 +1,4 @@
 // !LANGUAGE: +ProperIeee754Comparisons
-// IGNORE_BACKEND_FIR: JVM_IR
 
 fun less1(a: Float, b: Float) = a < b
 

compiler/testData/codegen/box/ieee754/safeCall.kt

@@ -1,4 +1,3 @@
-// IGNORE_BACKEND_FIR: JVM_IR
 fun box(): String {
     val plusZero: Double? = 0.0
     val minusZero: Double = -0.0